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Reduce memory usage copying Docker binaries

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This commit is contained in:
Josh Curl
2016-09-01 09:56:03 -07:00
parent d4a026dc5d
commit 73d0790e30
1 changed files with 18 additions and 2 deletions
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20
cmd/userdocker/main.go
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@@ -96,11 +96,27 @@ func copyBinaries(source, dest string) error {
sourceFile := path.Join(source, file.Name())
destFile := path.Join(dest, file.Name())
data, err := ioutil.ReadFile(sourceFile)
in, err := os.Open(sourceFile)
if err != nil {
return err
}
if err := ioutil.WriteFile(destFile, data, 0751); err != nil {
out, err := os.Create(destFile)
if err != nil {
return err
}
if _, err = io.Copy(out, in); err != nil {
return err
}
if err = out.Sync(); err != nil {
return err
}
if err = in.Close(); err != nil {
return err
}
if err = out.Close(); err != nil {
return err
}
if err := os.Chmod(destFile, 0751); err != nil {
return err
}
}